code: def _get_channels_with_positions(info):
      """Parse channel orientation/position."""
      ch_list = list()
      ch_inds = list()
      for ii, ch in enumerate(info["chs"]):
          if not (any(isnan(ch["loc"]))):
              ch_inds.append(ii)
              ch_list.append(ch["ch_name"])
      return ch_list, ch_inds
  
file_path: mne-python/mne/io/fil/tests/test_fil.py
imports: import shutil
  from os import remove
  import pytest
  import scipy.io
  from numpy import array, empty, isnan
  from numpy.testing import assert_array_almost_equal, assert_array_equal
  from mne import pick_types
  from mne.datasets import testing
  from mne.io import read_raw_fil
  from mne.io.fil.sensors import _get_pos_units
label_desc: Use image node_id 3 for calling a global function with example usage: _get_channels_with_positions(info) and returns: ch_list,  ch_inds